HI 991401-01

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HANNA – HI 991401-01

Education pH Tester

This indicator from HANNA has a large backlit LCD to give users instantaneous readings of both pH and temperature that can be easily read in dim light. The HI 991401-01 provides automatic calibration, automatic buffer selection and automatic temperature compensation.

HI 991401-01’s waterproof housing has been designed to meet the growers’ need for an indictor that is well suited to withstand the aggressive environments found in agricultural and hydroponics applications. Measurements are highly accurate and can be verified with one or two point calibrations. With a 12 VDC power supply included with the meter, low battery failures are never an issue.

The pH electrode has been specially designed to address the needs of growers. It’s design guarantees greater clogging resistance in fertilizer solutions with high concentrations of phosphate, nitrate, etc. to ensure longer electrode life.

Order Information:
HI 991401-01 (115V) and HI 991401-02 (230V) are supplied with HI 1293D pH electrode, HI 1294 temperature probe (fixed), HI 70004 pH 4.01 buffer solution sachet, HI 70007 pH 7.01 buffer solution sachet, 12 VDC power adapter and instructions.

Product Description

HANNA – HI 991401-01

Education pH Tester


ORP Range ±999 mV
ORP Resolution 1 mV
ORP Accuracy ±5 mV
Battery Type/Life 1.5V (4) / approximately 700 hours of continuous use
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 175 x 41 x 23 mm (6.9 x 1.6 x 0.9”)
Weight 95 g (3.4 oz.)
Ordering Information HI98201 (ORP) is supplied with protective cap, batteries and instructions


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